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Electromagnetic Induction — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsElectromagnetic Induction2 Marks
Question
An inductor-coil carries a steady-state current of 2.0A when connected across an ideal battery of emf 4.0V. If its inductance is 1.0H, find the time constant of the circuit.
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Answer

$\text{i}=2\text{A},\text{E}=4\text{V},\text{L}=1\text{H}$$\text{R}=\frac{\text{E}}{\text{i}}=\frac{4}{2}=2$
$\text{i}=\frac{\text{L}}{\text{R}}=\frac{1}{2}=0.5$

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